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q-centrix/performance-improvements-add_method_to_attributes
Performance improvements for add_method_to_attributes!
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Prevents two string allocations per method call for common REST verbs
plus a ~1.5x speedup for :get in particular
```ruby
begin
require "bundler/inline"
rescue LoadError => e
$stderr.puts "Bundler version 1.10 or later is required. Please update
your Bundler"
raise e
end
gemfile(true) do
source "https://rubygems.org"
gem "benchmark-ips"
gem "rails"
end
def allocate_count
GC.disable
before = ObjectSpace.count_objects
yield
after = ObjectSpace.count_objects
after.each { |k,v| after[k] = v - before[k] }
after[:T_HASH] -= 1 # probe effect - we created the before hash.
GC.enable
result = after.reject { |k,v| v == 0 }
GC.start
result
end
@html_options = {}
def master_version
if @method && @method.to_s.downcase != "get" && @html_options["rel".freeze] !~ /nofollow/
@html_options["rel".freeze] = "#{@html_options["rel".freeze]} nofollow".lstrip
end
@html_options["data-method".freeze] = @method
end
def fast_version
if method_not_get_method?(@method) && @html_options["rel".freeze] !~ /nofollow/
@html_options["rel".freeze] = "#{@html_options["rel".freeze]} nofollow".lstrip
end
@html_options["data-method".freeze] = @method
end
STRINGIFIED_COMMON_METHODS = {
get: 'get',
delete: 'delete',
patch: 'patch',
post: 'post',
put: 'put',
}.freeze
def method_not_get_method?(method)
return false unless method
(STRINGIFIED_COMMON_METHODS[method] || method.to_s.downcase) != 'get'
end
puts 'get'
@method = :get
puts "master_version"
puts allocate_count { 1000.times { master_version } }
puts "fast_version"
puts allocate_count { 1000.times { fast_version } }
Benchmark.ips do |x|
x.report("master_version") { master_version }
x.report("fast_version") { fast_version }
x.compare!
end
puts 'delete'
@method = :delete
puts "master_version"
puts allocate_count { 1000.times { master_version } }
puts "fast_version"
puts allocate_count { 1000.times { fast_version } }
Benchmark.ips do |x|
x.report("master_version") { master_version }
x.report("fast_version") { fast_version }
x.compare!
end
```
```
get
master_version
{:FREE=>-1819, :T_STRING=>2052}
fast_version
{:FREE=>-1}
Warming up --------------------------------------
master_version 140.839k i/100ms
fast_version 175.639k i/100ms
Calculating -------------------------------------
master_version 2.683M (± 7.1%) i/s - 13.380M in 5.013447s
fast_version 3.988M (±10.1%) i/s - 19.847M in 5.039580s
Comparison:
fast_version: 3988340.3 i/s
master_version: 2683336.2 i/s - 1.49x slower
delete
master_version
{:FREE=>-5003, :T_STRING=>3003, :T_MATCH=>999, :T_IMEMO=>1000}
fast_version
{:FREE=>-3002, :T_STRING=>1001, :T_MATCH=>1000, :T_IMEMO=>1000}
Warming up --------------------------------------
master_version 47.221k i/100ms
fast_version 44.153k i/100ms
Calculating -------------------------------------
master_version 597.881k (±11.4%) i/s - 2.975M in 5.047200s
fast_version 686.014k (±11.6%) i/s - 3.400M in 5.036564s
Comparison:
fast_version: 686014.5 i/s
master_version: 597881.4 i/s - same-ish: difference falls within error
```
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* Add a #populate method to migrations
* Address rubocop issues
* Rename to #up_only and use #execute in the examples intead of the model
* Update CHANGELOG
[Rich Daley & Rafael Mendonça França]
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CI against JRuby 9.1.14.0
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JRuby 9.1.14.0 has been released and this version is available on Travis CI.
http://jruby.org/2017/11/08/jruby-9-1-14-0
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Update `exists?` documentation [ci skip]
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Make it clear that `exists?` can be chained onto a relation
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Update layouts_and_rendering.md [ci skip]
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Disallow raw SQL in dangerous AR methods
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with Arel SQL literator which overrides #concat
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Compression has long been available, but opt-in and at a 16kB threshold.
It wasn't enabled by default due to CPU cost. Today it's cheap and
typical cache data is eminently compressible, such as HTML or JSON
fragments.
Compression dramatically reduces Memcached/Redis mem usage, which means
the same cache servers can store more data, which means higher hit
rates.
To disable compression, pass `compress: false` to the initializer.
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Currently the environment is not loaded in some db tasks.
Therefore, if use encrypted secrets values in `database.yml`,
`read_encrypted_secrets` will not be true, so the value can not be
used correctly.
To fix this, added `environment` as dependency of `load_config`.
It also removes explicit `environment` dependencies that are no longer
needed.
Fixes #30717
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* Supports vanilla Redis, hiredis, and Redis::Distributed.
* Supports Memcached-like sharding across Redises with Redis::Distributed.
* Fault tolerant. If the Redis server is unavailable, no exceptions are
raised. Cache fetches are treated as misses and writes are dropped.
* Local cache. Hot in-memory primary cache within block/middleware scope.
* `read_/write_multi` support for Redis mget/mset. Use Redis::Distributed
4.0.1+ for distributed mget support.
* `delete_matched` support for Redis KEYS globs.
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Cache regexps generated from acronym_regex
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To be removed in Rails 6.0 (default for the deprecate helper). Code
moved around as well for the ActiveSupport::Deprecation modules, since
it was dependent on ActiveSupport::Inflector being loaded for it to
work. By "lazy loading" the Inflector code from within the Deprecation
code, we can require ActiveSupport::Deprecation from
ActiveSupport::Inflector and not get a circular dependency issue.
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The Problem
-----------
The following line from `String#camelize`:
string = string.sub(/^(?:#{inflections.acronym_regex}(?=\b|[A-Z_])|\w)/) { |match| match.downcase }
and the following line from `String#camelize`:
word.gsub!(/(?:(?<=([A-Za-z\d]))|\b)(#{inflections.acronym_regex})(?=\b|[^a-z])/) { "#{$1 && '_'.freeze }#{$2.downcase}" }#{$2.downcase}" }
Both generate the same regexep in the first part of the `.sub`/`.gsub`
method calls every time the function is called, creating an extra object
allocation each time. The value of `acronym_regex` only changes if the
user decides add an acronym to the current set of inflections and apends
another string on the the regexp generated here, but beyond that it
remains relatively static.
This has been around since acronym support was introduced back in 2011
in PR#1648.
Proposed Solution
-----------------
To avoid re-generating these strings every time these methods are
called, cache the values of these regular expressions in the
`ActiveSupport::Inflector::Inflections` instance, making it so these
regular expressions are only generated once, or when the acronym's are
added to.
Other notable changes is the attr_readers are nodoc'd, as they shouldn't
really be public APIs for users. Also, the new method,
define_acronym_regex_patterns, is the only method in charge of
manipulating @acronym_regex, and initialize_dup also makes use of that
new change.
** Note about fix for non-deterministic actionpack test **
With the introduction of `@acronym_underscore_regex` and
`@acronym_camelize_regex`, tests that manipulated these for a short
time, then reset them could caused test failures to happen. This
happened because the previous way we reset the `@acronyms` and
`@acronym_regex` was the set them using #instance_variable_set, which
wouldn't run the #define_acronym_regex_patterns method.
This has now been introduced into the actionpack tests to avoid this
failure.
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Sort mailer previews alphabetically
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Closes #31138.
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fix bug on added? method
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fix rubocop issues
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The documentation claims that given values go through "normal AR type
casting and serialization", which to me implies
`serialize(cast(value))`, not just serialization. The docs were changed
to use this wording in #22492. The tests I cited in that PR (which is
the same test modified in this commit), is worded in a way that implies
it should be using `cast` as well.
It's possible that I originally meant "normal type casting" to imply
just the call to `serialize`, but given that `update_all(archived:
params['archived'])` seems to be pretty common, I'm inclined to make
this change as long as no tests are broken from it.
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Do not use `Arel.star` when `ignored_columns`
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If there are any ignored columns, we will now list out all columns we
want to be returned from the database.
Includes a regression test.
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Make clear that the files are not to be run for interpreters.
Fixes #23847.
Fixes #30690.
Closes #23878.
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y-yagi/make_sidekiq_and_resque_integration_tests_work_in_ci
Make sidekiq and resque integration tests work in ci
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Since 8f2490b, the integration test of sidekiq and resque is not working
in CI.
https://travis-ci.org/rails/rails/jobs/301276197#L2055
https://travis-ci.org/rails/rails/jobs/301276197#L2061
Because 8f2490b removed password from `redis-server`.
So must also remove passwords from these tests.
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